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Modeling of hydrocarbon adsorption on continental oil shale: A case study on n-alkane

机译：陆相油页岩中碳氢化合物吸附的模拟：以正构烷烃为例

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摘要

Oil adsorption on the pore surface of tight shale affects the transport and even recovery of oil through shale reservoir. In this paper, an innovative model evaluating the n-alkane adsorption on shale was developed theoretically according to the hydrocarbon vapor adsorption (HVA) process and was verified by the n-decane (i.e., n-C-10) adsorption on continental oil shale obtained from the Dongying sag of the southeastern Bohai Bay basin of China. The model considered the multilayer adsorption of hydrocarbon and the microscopic characteristics of the shale pore system. For a case study, several parameters in the models were determined by low temperature nitrogen adsorption/desorption (LT-N(2)A/D) and HVA tests combined with recently reported molecular dynamics simulation. Next, optimal values of the coefficients k and beta were determined by fitting the experimental data with the model and were used to calculate the n-C-10 adsorbed amount under 0.8 P/P-0 and 298.15 K condition. Simultaneously, the n-C-10 condensed (i.e., free-phase-like) amount was obtained. The primary results demonstrate that (1) n-C-10 adsorbed amount is obviously lower than condensed amount and varies from 0.097 to 0.619 mg/g (mean 0.311 mg/g), accounting for 1.68-3.76% (mean 2.32%) of the total amount. (2) Both the adsorbed and condensed amounts are directly controlled by total pore volume, which are mainly contributed by organic matters and secondarily by pyrite and siderite in shale. The model will be potential useful to evaluate the shale oil adsorption. (C) 2017 Elsevier Ltd. All rights reserved.
机译：致密页岩孔隙表面上的油吸附会影响油通过页岩储层的运输甚至恢复。本文根据碳氢化合物蒸气吸附（HVA）过程，理论上开发了评估页岩中正构烷烃吸附的创新模型，并通过正癸烷（即，nC-10）吸附在从页岩获得的大陆油页岩上进行了验证。中国东南渤海湾盆地的东营凹陷。该模型考虑了碳氢化合物的多层吸附和页岩孔隙系统的微观特征。对于案例研究，模型中的几个参数是通过低温氮吸附/解吸（LT-N（2）A / D）和HVA测试与最近报道的分子动力学模拟相结合来确定的。接下来，通过将实验数据与模型拟合来确定系数k和β的最佳值，并用于计算在0.8 P / P-0和298.15 K条件下n-C-10的吸附量。同时，获得n-C-10缩合（即，类似自由相）的量。初步结果表明：（1）nC-10的吸附量明显低于冷凝量，从0.097至0.619 mg / g（平均0.311 mg / g）不等，占总量的1.68-3.76％（平均2.32％）。量。 （2）吸附量和凝结量都直接受总孔隙体积的控制，总孔隙体积主要由有机质引起，其次是页岩中的黄铁矿和菱铁矿。该模型将对评估页岩油吸附潜力有用。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2017年第15期|603-613|共11页
  • 作者

    Li Junqian; Lu Shuangfang; Xie Liujuan; Zhang Jie; Xue Haitao; Zhang Pengfei; Tian Shansi;

  • 作者单位

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao 266580, Shandong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Shale oil; Modeling; Hydrocarbon adsorption; Capillary condensation; n-Alkane;

    机译：页岩油;建模;烃吸附;毛细管冷凝;正构烷烃;

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